We divide 408401 by 23
The aim is to understand the frequency of 23 in 408401.

On to step 1:
23 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 23

Advancing to step 2:
The number 23 fits into 40 1 times, leaving a remainder of 17.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 23 from 40 and we're left with 17.
Include the next digit (8) from the dividend after 17, then repeat: 178 / 23

Let's proceed to step 3:
When dividing 178 by 23, we get 7 with a remainder of 17.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
The remainder is 17 after subtracting 161 from 178.
Fetch the next digit (4) from the dividend, attach it to 17 and continue: 174 / 23

Advancing to step 4:
23 can be fit into 174 7 times, resulting in a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 177.0
Deduct 161 from 174 and we're left with 13.
Take the next digit (0) from the dividend and append it to 13, then repeat: 130 / 23

Moving on to step 5:
130 divided by 23 is 5 with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 1775.0
Subtracting 115 from 130 leaves us with 15.
Take the next digit (1) from the dividend and append it to 15, then repeat: 151 / 23

Step 6:
When dividing 151 by 23, we get 6 with a remainder of 13.
The number 6 becomes the next digit in our result. 
Result so far: 17756.0
If we subtract 138 from 151, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 7:
If we divide 130 by 23, we get 5 and a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 17756.5
The remainder is 15 after subtracting 115 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 8:
23 goes into 150 6 times with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 17756.56
Deduct 138 from 150 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 9:
23 goes into 120 5 times with a remainder of 5.
The next digit of our result is 5. 
Result so far: 17756.565
If we subtract 115 from 120, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 10:
If we divide 50 by 23, we get 2 and a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 17756.5652
Subtract 46 from 50 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 11:
23 goes into 40 1 times with a remainder of 17.
The number 1 becomes the next digit in our result. 
Result so far: 17756.56521
Subtracting 23 from 40 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 12:
When dividing 170 by 23, we get 7 with a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 17756.565217
Deduct 161 from 170 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 13:
If we divide 90 by 23, we get 3 and a remainder of 21.
Use 3 as the next digit of our solution. 
Result so far: 17756.5652173
The remainder is 21 after subtracting 69 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 14:
The number 23 fits into 210 9 times, leaving a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 17756.56521739
Subtract 207 from 210 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

After the division, we end up with 17756.56521739 and a remainder of 3e-09.